/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */

package Validation;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import SQLAPI.*;
import javax.servlet.RequestDispatcher;
import javax.servlet.http.HttpSession;


/**
 *
 * @author anvil
 */
@WebServlet(name = "Login", urlPatterns = {"/Login"})
public class Login extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException 
    {
        
        String username="",password="",message="";
        username=request.getParameter("username");
        password=request.getParameter("password");
        
        if(username!=null && !username.equals(""))
        {
            if(password!=null && !username.equals(""))
            {
                SQL sql = new SQL();
                String name=sql.login(username,password);
                if(name!=null)
                {
                    HttpSession session = request.getSession();
                    session.setAttribute("firstname", name);
                    RequestDispatcher home = request.getServletContext().getRequestDispatcher("home.jsp");
                    home.forward(request, response);
                }
                if(name==null)
                {
                    message="Login Failed";
                    RequestDispatcher fail = request.getServletContext().getRequestDispatcher("index.jsp?message="+message);
                    fail.forward(request, response);
                }
            }
        }
        response.sendRedirect("index.jsp?message=Login Failed");
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
